21222110120212 has 48 divisors (see below), whose sum is σ = 39767881668480. Its totient is φ = 9873986614272.

The previous prime is 21222110120209. The next prime is 21222110120221. The reversal of 21222110120212 is 21202101122212.

It is a self number, because there is not a number n which added to its sum of digits gives 21222110120212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94341223 + ... + 94565905.

It is an arithmetic number, because the mean of its divisors is an integer number (828497534760).

Almost surely, 2^{21222110120212} is an apocalyptic number.

It is an amenable number.

21222110120212 is a deficient number, since it is larger than the sum of its proper divisors (18545771548268).

21222110120212 is a wasteful number, since it uses less digits than its factorization.

21222110120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240400 (or 240398 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21222110120212 its reverse (21202101122212), we get a palindrome (42424211242424).

The spelling of 21222110120212 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred ten million, one hundred twenty thousand, two hundred twelve".